Continuity mistake: The scarf around Ellie's neck (in the car) repeatedly changes. Make up your mind, love.
Continuity mistake: In the Christmas morning scene after Winhert's lawyer leaves, while Nora says, "Oh, the mystery's all gone" she crosses her arms in front of her, in the next shot her arms are crossed behind her.
Continuity mistake: When Peter Pig and Donald Duck are dancing outside the "Idle Hour Club", you can see the door to the Club is open, but when the camera cuts to Donald, the door is shut, and in the next shot, the door is open again.
Continuity mistake: Tom Caldwell failed to convince the board of his company and leaves the meeting dejected, his blueprints under his left arm. When he is coming out of the room, the longer rolled sheet is in his hand already. (00:07:30)
Continuity mistake: When Tom is on trial, the large crowd is there to witness. Barnaby is there, thinking he got away with his ploy. There is a man standing next to Barnaby who disappears from the wide shot and reappears in the closeups.
Continuity mistake: When Oliver has finished talking to the lady about the trip on the telephone, there is a milk stain on his tie. When he goes over to collect his waistcoat from Stan, the stain has disappeared.
Continuity mistake: When Robert Donat is sword fighting with the Count Montego, Count Montego's sword switches from right hand to left hand.
Continuity mistake: Bertha Krasnoff, a furrier known to her customers as Madame Valerie, has a purse hanging from her left arm as she says goodbye to a customer exiting the shop. When she greets another woman entering the shop, the purse is now on her right arm.